Southwest® flights from Tucson to St. Louis from $178

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Low fares from Tucson to St. Louis

$

Tucson (TUS)to

St. Louis (STL)
Depart: 09/21/2026

One-way

Basic

From
$178
Seen: 21 hrs ago

Tucson (TUS)to

St. Louis (STL)
Depart: 10/07/2026

One-way

Basic

From
$193
Seen: 56 minutes ago

Tucson (TUS)to

St. Louis (STL)
Depart: 09/01/2026

One-way

Basic

From
$193
Seen: 4 hrs ago

Tucson (TUS)to

St. Louis (STL)
Depart: 09/21/2026

One-way

Choice

From
$223
Seen: 21 hrs ago

Tucson (TUS)to

St. Louis (STL)
Depart: 10/07/2026

One-way

Choice

From
$238
Seen: 56 minutes ago

Tucson (TUS)to

St. Louis (STL)
Depart: 09/01/2026

One-way

Choice

From
$238
Seen: 4 hrs ago

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Explore flights from Tucson to St. Louis

Aug 2026
From$269*
Seen: 16 hrs ago
One Way/Basic
Sep 2026
From$178*
Seen: 21 hrs ago
One Way/Basic
Oct 2026
From$193*
Seen: 56 minutes ago
One Way/Basic
cmp-daily-histogram-bars-legend-min-price-aria-label $269
Displaying fares for August-2026
  • TUS–STL, 08/01/2026: From $529
    01

    Sat

    AUG

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  • TUS–STL, 08/03/2026: From $529
    03

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  • TUS–STL, 08/06/2026: From $529
    06

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  • TUS–STL, 08/10/2026: From $454
    10

    Mon

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    11

    Tue

  • TUS–STL, 08/12/2026: From $454
    12

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  • TUS–STL, 08/13/2026: From $454
    13

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  • TUS–STL, 08/14/2026: From $269
    14

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    19

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    21

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    27

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    28

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    29

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    30

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    31

    Mon

    • Range$269-$529

    *Fares displayed have been collected within the last 24 hours and may no longer be available at time of booking. Additional fees and charges for optional products and services may apply. Modifying this information may result in a different fare. To find the most updated fare, please visit Southwest.com. Fares listed are Basic, which are subject to additional terms and conditions.

    Flight Details

    Departing from:
    Tucson International Airport
    Arriving at:
    Lambert-St Louis Int'l Airport
    Distance:
    1244 miles

    Route Information

    128† Weekly flights

    † Weekly flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025. Note: route may not operate every day of the week.

    ‡ Nonstop flights based on DOT published scheduled average flights Monday through Sunday between 9/1/2025 and 9/30/2025.

    Questions we hear the most

    There are 128 weekly flights from Tucson to St. Louis on Southwest Airlines.
    To find the lowest fares by day and time to fly Tucson to St. Louis with Southwest, check out our Low Fare Calendar.
    You can rent a car at Lambert-St Louis Int'l Airport book yours with your flight.
    Yes! Flights from Tucson to St. Louis—or from here or there to anywhere—can be changed with no change fees. Fare difference may apply.
    Check the status of your upcoming Southwest flight.
    Check out the Southwest Airlines® Help Center for answers about everything Southwest.

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